/* =====================================================================
   COVAE LABS · main.css
   Tokens semánticos + reset + layout + componentes + secciones + media
   Cumplimiento: WCAG 2.2 AA en claro y oscuro (mismo código, semántica OK)
   ===================================================================== */

/* ---------- 1. TOKENS (paleta + tipografía + espaciado) ---------- */
:root {
  /* Brand */
  --cova-green:        #173d35;
  --cova-green-900:    #112e29;
  --cova-green-950:    #0d2521;
  --cova-green-700:    #24594e;
  --cova-green-100:    #dceae5;
  --stone-100:         #f2efe8;
  --stone:             #e8e3d8;
  --copper:            #b7793e;
  --copper-light:      #d7a56d;
  --copper-hover:      #9d6431;
  --graphite:          #191c1b;
  --off-white:         #f8f8f5;

  /* Semánticos */
  --bg:                var(--stone-100);
  --bg-card:           #ffffff;
  --bg-card-alt:       var(--stone);
  --fg:                var(--graphite);
  --fg-muted:          #65706c;
  --fg-subtle:         #8c9892;
  --border:            #dfe2dc;
  --border-strong:     #c8cec7;
  --primary:           var(--cova-green);
  --primary-hover:     var(--cova-green-900);
  --on-primary:        #ffffff;
  --accent:            var(--copper);
  --accent-hover:      var(--copper-hover);
  --on-accent:         #ffffff;

  /* Tipografía */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-stack-mono: ui-monospace, SFMono-Regular, "SF Mono",
                     Menlo, Consolas, "Liberation Mono", monospace;

  /* Escala */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --radius-sm: 0.5rem;
  --radius:    0.75rem;
  --radius-lg: 1rem;

  --shadow-sm: 0 1px 2px rgba(25, 28, 27, 0.06);
  --shadow:    0 2px 8px rgba(25, 28, 27, 0.07),
               0 1px 3px rgba(25, 28, 27, 0.04);
  --shadow-md: 0 6px 18px rgba(25, 28, 27, 0.11);

  --content-max: 75rem;     /* 1200px */
  --reading-max: 40rem;     /* ~640px */

  --header-h: 4rem;

  --ease: 180ms cubic-bezier(.2, .6, .2, 1);
  --ease-slow: 300ms cubic-bezier(.2, .6, .2, 1);
}

/* Tema oscuro (automático por sistema, sin interruptor en v1) */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:                var(--cova-green-950);
    --bg-card:           var(--cova-green-900);
    --bg-card-alt:       #0f2724;
    --fg:                var(--off-white);
    --fg-muted:          #aab9b3;
    --fg-subtle:         #789088;
    --border:            #24463f;
    --border-strong:     #31534b;
    --primary:           var(--cova-green-700);
    --primary-hover:     #2c685a;
  }
}

/* ---------- 2. RESET + BASE ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  color-scheme: light dark;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 1rem;          /* 16px min */
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg, video { max-width: 100%; height: auto; display: block; }

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); text-decoration: underline; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--fg);
}

h1 { font-size: clamp(1.875rem, 4vw + 1rem, 3rem); }
h2 { font-size: clamp(1.5rem, 2.5vw + 0.5rem, 2rem); }
h3 { font-size: 1.125rem; font-weight: 600; }

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 1.25rem; margin: 0 0 var(--space-4); }
ul[role="list"] { list-style: none; padding: 0; margin: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Util accessibility */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  background: var(--primary);
  color: var(--on-primary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  z-index: 999;
  font-weight: 600;
}
.skip-link:focus { left: 1rem; }

/* ---------- 3. LAYOUT ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}
.container-narrow {
  max-width: var(--reading-max);
}

main {
  flex: 1;
  padding-block: var(--space-12);
}

.section {
  padding-block: var(--space-16);
}
.section-alt {
  background: var(--bg-card-alt);
  border-block: 1px solid var(--border);
}

/* ---------- 4. HEADER + NAV ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(248, 248, 245, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(13, 37, 33, 0.88); }
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--fg);
  text-decoration: none;
  font-weight: 700;
}
.brand:hover { text-decoration: none; }
.brand:focus-visible { outline-offset: 6px; }

.signum {
  width: 2rem;
  height: 2rem;
  color: var(--primary);
  flex: none;
}
.signum-ring,
.signum-axis { stroke: currentColor; }
.signum-diamond,
.signum-dot { fill: currentColor; }

.brand-wordmark { display: inline-flex; flex-direction: column; line-height: 1; }
.brand-name {
  font-size: 1.25rem;
  letter-spacing: 0.12em;
  font-weight: 700;
}
.brand-tag {
  margin-top: 4px;
  font-size: 0.8125rem;          /* 13px bold uppercase: decorativo de marca */
  letter-spacing: 0.3em;
  color: var(--accent);
  font-weight: 700;
}

/* Mobile menu toggle */
.menu-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.menu-bar { display: block; height: 2px; background: var(--fg); border-radius: 1px; }

/* Navigation */
.site-nav {
  display: none;
  position: absolute;
  inset: var(--header-h) 0 auto 0;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: var(--space-5);
  box-shadow: var(--shadow);
}
.site-nav.is-open { display: block; }
.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.nav-list a {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  color: var(--fg);
  font-weight: 500;
  min-height: 44px;
}
.nav-list a:hover,
.nav-list a:focus-visible {
  background: var(--bg-card-alt);
  color: var(--primary);
  text-decoration: none;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.nav-cta:hover { background: var(--accent-hover); color: var(--on-accent); text-decoration: none; }

/* Desktop nav */
@media (min-width: 880px) {
  .menu-toggle { display: none; }
  .site-nav {
    display: flex;
    position: static;
    background: transparent;
    backdrop-filter: none;
    padding: 0;
    box-shadow: none;
    border-bottom: 0;
    align-items: center;
    gap: var(--space-4);
    flex: 1;
    justify-content: flex-end;
  }
  .nav-list {
    flex-direction: row;
    gap: var(--space-1);
    margin-right: var(--space-4);
  }
  .nav-list a {
    padding: var(--space-2) var(--space-3);
    font-size: 0.9375rem;
  }
  .nav-cta { margin-top: 0; }
}

/* ---------- 5. HERO ---------- */
.hero {
  padding-block: var(--space-20) var(--space-16);
  background:
    radial-gradient(circle at 80% 20%, rgba(183, 121, 62, 0.06), transparent 55%),
    radial-gradient(circle at 10% 90%, rgba(23, 61, 53, 0.06), transparent 55%);
}
.hero-inner {
  display: grid;
  gap: var(--space-10);
  grid-template-columns: 1fr;
  align-items: center;
}
.hero-copy {
  width: min(100%, 38rem);
  min-width: 0;
  text-align: center;
  margin-inline: auto;
}
.hero-copy .lede { margin-inline: auto; }
.hero-art {
  display: grid;
  place-items: center;
  min-width: 0;
  color: var(--primary);
  opacity: 0.92;
}
@media (min-width: 768px) {
  .hero-inner { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); }
  .hero-copy { text-align: left; margin-inline: 0; }
  .hero-copy .lede { margin-inline: 0; }
  .hero-copy .cta-row { justify-content: flex-start; }
}
@media (min-width: 1280px) {
  .hero-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-16); }
}
.scroll-cue { grid-column: 1 / -1; }

.signum-xl {
  width: min(88%, clamp(220px, 28vw, 380px));
  height: auto;
  animation: signum-float 8s ease-in-out infinite;
}
@keyframes signum-float {
  0%, 100% { transform: rotate(0deg); }
  50%      { transform: rotate(6deg); }
}

/* === Scroll cue (chevron al final del hero) === */
.scroll-cue {
  display: block;
  width: 28px;
  height: 28px;
  margin-inline: auto;
  color: var(--accent);
  opacity: 0.85;
  animation: cue-bob 2.4s cubic-bezier(.4, 0, .2, 1) infinite;
}
@keyframes cue-bob {
  0%, 100% { transform: translateY(0); opacity: 0.55; }
  50%      { transform: translateY(8px); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .scroll-cue { animation: none; opacity: 0.55; }
}
@media (min-width: 768px) {
  .scroll-cue { display: none; }
}

/* === abbr (RGPD, LSSI) === */
abbr[title] {
  text-decoration: underline dotted;
  cursor: help;
}

/* === "Avísame" como CTA activo para Próximamente === */
.btn-aviso {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--ease), border-color var(--ease), color var(--ease);
}
.btn-aviso:hover,
.btn-aviso:focus-visible {
  background: var(--bg-card-alt);
  border-color: var(--accent);
  color: var(--accent-hover);
  text-decoration: none;
}

/* === aria-current="page" navigation === */
.nav-list a[aria-current="page"] {
  color: var(--accent);
  background: var(--bg-card-alt);
}

.eyebrow {
  display: inline-block;
  font-size: 0.875rem;          /* 14px bold uppercase => WCAG AA-large OK */
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--space-4);
}
.lede {
  font-size: 1.125rem;
  color: var(--fg-muted);
  margin-bottom: var(--space-6);
  max-width: 32rem;
}

.project-icon { color: var(--primary); }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* ---------- 6. BOTONES ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--ease), color var(--ease),
              border-color var(--ease), transform var(--ease);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:focus-visible { outline-offset: 3px; }

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: 0 3px 8px rgba(23, 61, 53, 0.20);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--primary-hover);
  color: var(--on-primary);
}

.btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-strong);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--accent);
  background: var(--bg-card-alt);
  color: var(--accent);
}

/* ---------- 7. SECCIONES GENÉRICAS ---------- */
.section-title {
  font-size: clamp(1.5rem, 2.5vw + 0.5rem, 2rem);
  margin-bottom: var(--space-4);
}
.section-lede {
  font-size: 1.0625rem;
  color: var(--fg-muted);
  max-width: var(--reading-max);
  margin-bottom: var(--space-10);
}

/* ---------- 8. GRIDS ---------- */
.grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}
@media (min-width: 640px)  { .grid-2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 880px)  {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1080px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } }

/* ---------- 9. CARDS ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: border-color var(--ease), transform var(--ease),
              box-shadow var(--ease);
}
.card:hover,
.card:focus-within {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.card-icon {
  width: 2.25rem;
  height: 2.25rem;
  flex: none;
  color: var(--primary);
}
.card-icon svg { width: 100%; height: 100%; }
.card-title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--fg);
}
.card-body { color: var(--fg-muted); margin: 0; font-size: 0.9375rem; }

.card-meta {
  font-size: 0.8125rem;
  color: var(--fg-subtle);
  margin-top: auto;
}

.card-link {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 0.9375rem;
  margin-top: var(--space-2);
  color: var(--primary);
}
.card-link:hover { color: var(--primary-hover); text-decoration: underline; }

.card-link-disabled {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 0.9375rem;
  margin-top: var(--space-2);
  color: var(--fg-subtle);
  cursor: not-allowed;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-progress {
  background: rgba(183, 121, 62, 0.13);
  color: var(--copper);
}
.badge-soon {
  background: var(--cova-green-100);
  color: var(--cova-green);
}
@media (prefers-color-scheme: dark) {
  .badge-soon { background: rgba(36, 89, 78, 0.25); color: var(--cova-green-100); }
}

/* ---------- 10. PRINCIPIOS ---------- */
.principles { margin-block: var(--space-8); }
.principle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.principle-title {
  font-size: 1rem;
  margin: 0 0 var(--space-2);
}
.principle-body {
  color: var(--fg-muted);
  margin: 0;
  font-size: 0.9375rem;
}

/* ---------- 11. CONTACTO ---------- */
.contact-block {
  margin-top: var(--space-6);
  font-size: 1.0625rem;
}
.contact-label {
  font-weight: 600;
  color: var(--fg);
  display: inline-block;
  min-width: 5rem;
}

/* ---------- 12. FOOTER ---------- */
.site-footer {
  background: var(--cova-green-900);
  color: rgba(248, 248, 245, 0.85);
  padding-block: var(--space-10);
  border-top: 1px solid var(--cova-green-700);
  margin-top: auto;
}
@media (prefers-color-scheme: dark) {
  .site-footer {
    background: #06191c;
  }
}
.footer-inner {
  display: grid;
  gap: var(--space-6);
  align-items: start;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .footer-inner { grid-template-columns: auto 1fr auto; align-items: center; }
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--off-white);
}
.footer-brand .signum { color: var(--off-white); }
.footer-name {
  font-size: 1rem;
  letter-spacing: 0.1em;
  font-weight: 700;
}
.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-nav a {
  color: rgba(248, 248, 245, 0.78);
  font-size: 0.875rem;
}
.footer-nav a:hover { color: var(--off-white); text-decoration: underline; }
.copyright {
  color: rgba(248, 248, 245, 0.55);
  font-size: 0.8125rem;
  margin: 0;
}

/* ---------- 13. LEGAL (privacidad, aviso-legal) ---------- */
.legal {
  max-width: var(--reading-max);
  margin-inline: auto;
}
.legal h1 { margin-bottom: var(--space-2); }
.legal .lead { color: var(--fg-muted); margin-bottom: var(--space-8); }
.legal h2 {
  font-size: 1.125rem;
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-2);
}
.legal h3 {
  font-size: 1rem;
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}
.legal p, .legal li {
  color: var(--fg);
  font-size: 0.9375rem;
}
.legal ul { margin-bottom: var(--space-4); }
.legal a { color: var(--primary); }
.legal dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-4) 0;
}
.legal dt { font-weight: 600; }
.legal dd { margin: 0; }

/* ---------- 14. PRINT ---------- */
@media print {
  .site-header, .menu-toggle, .nav-cta, .site-footer { display: none; }
  body { background: white; color: black; }
  a::after { content: " (" attr(href) ")"; font-size: 0.85em; color: #555; }
}